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    Question

    A mixture of milk and water measures 60 litres. It

    contains 10% water. How much water should be added to it, so that the water may be 25%?
    A 14 litres Correct Answer Incorrect Answer
    B 12 litres Correct Answer Incorrect Answer
    C 16 litres Correct Answer Incorrect Answer
    D 18 litres Correct Answer Incorrect Answer

    Solution

    Milk in mixture = 60 x 90% = 54 L Water in mixture = 60 x 10% = 6 L Let's assume that water is added in the mixture is x Liters. Now mixture is = (60 + x)┬а After addition water = (60 + x)┬а According to the question: (60 + x) x 75% = 54┬а 60+ x = (54 ├Ч 100)/75┬а 60+ x = 18 x 4┬а x=72-60 ┬аx = 12 Liters

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